This seems to be an extension of Zoller's earlier research on the most well-connected entrepreneurs, financiers and advisors in the US, where he looked specifically at the universe of early stage investors in the companies in 12 high-tech growth spots - Silicon Valley, Boston, Seattle, etc. Flip this data around to look at it from the point of view of a regional community rather than from individual investors or companies, and I suppose it can give you a good sense of how broad-based the financial part of the early-stage entrepreneurial ecosystem is in a particular community.